Fix panel build error on macOS

The original goal was to simplify the init function
across all platforms, but to solve the build issue
for now, an extra check specific to macOS is added.

Also bumps version to 2.13.1.

browser-version.h

@@ -2,7 +2,7 @@
 
 #define OBS_BROWSER_VERSION_MAJOR 2
 #define OBS_BROWSER_VERSION_MINOR 13
-#define OBS_BROWSER_VERSION_PATCH 0
+#define OBS_BROWSER_VERSION_PATCH 1
 
 #ifndef MAKE_SEMANTIC_VERSION
 #define MAKE_SEMANTIC_VERSION(major, minor, patch) \

panel/browser-panel.cpp

@@ -260,7 +260,13 @@ void QCefWidgetInternal::Init()
 #else
 		CefRect rc = {0, 0, size.width(), size.height()};
 #endif
+
+#ifdef __APPLE__
+		windowInfo.SetAsChild((CefWindowHandle)handle, 0, 0,
+				      size.width(), size.height());
+#elif
 		windowInfo.SetAsChild((CefWindowHandle)handle, rc);
+#endif
 
 		CefRefPtr<QCefBrowserClient> browserClient =
 			new QCefBrowserClient(this, script, allowAllPopups_);